Nut-lock.



W. T. THURSTON.

NUT LOCK.

APPLICATION TILED DEC. 23, 1913.

1,1 10,839, Patented Sept. 15,1914.

2 BHEBTS-SHBBT l.

wuvmtom v WTTZZZWSYBTL w THE NORRIS PETERS 60., PHOTO-LITHCL, WASHINGTON. D. C.

W. T. THURSTON.

NUT LOCK.

APPLICATION FILED mo. 23; 1913.

1,1 10,839. Patented Sept. 15,1914.

2 SHEETS-SHEET 2.

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As 14/. 7." Time? UNITED STATES PATENT OFFICE.

WILLIAM T. THURSTON, or QUINCY, MAssAorinsnTrs, ASSIGNOR or own-rooms IO JOHN LAWLOR, or conconn, massaonusn'rrs, AND ONE-FOURTH T FEANKL.

JONES, orMELnosE, ivrnssAcnusnrrs.

NUT-1306K. f"

To all whom it may concern: Be it known that I, WILLLAM,T. THURS- 1 TON, a citizenof the United States, residing at Quincy, in thecounty of Norfolk and State of Massachusetts, have invented certain new and useful Improvementsin Nut- Locks; andldo hereby declare thefollowmg to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertalns to make and use the same. My invention relates to new and useful improvements innut locks and has for its object the provision of a simple and efficient device for securely looking a nut on a bolt so that loosening thereof by vibration or from other causes is positively eliminated. Another objectofl'my invention is to pro vicle a nut lock which consists of arectangular washer plate constructed and arranged to detachably hold a nut engaging and locking member that is adapted for engagement with one of the faces of the nut so as to positively prevent the rotation of the nut. A further object of the invention is to provide a nut lock such as described which is simple as to construction and arrangement of parts and cheap to manufacture.

The above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more 7 particularly pointedout in the claims which are appended hereto and form a part of this application. 1

With reference to the drawings, wherein, I have illustrated the preferred embodiment of my invention as it is reduced to practice, and throughout the several views of which, similar reference numerals'designate corresponding parts: Figure 1 is a side elevation illustrating my device as it would ap;

pear in assembled operative position and applied to the rails of the track, Fig. 2 is a vertical sectional View taken on line 22 of Fig. 1, illustrating my device in assembled locked position, Fig. 3 is a longitudinal sectional view taken on line 3-3 of. Fig. 1, Fig. 4 is a detail perspective view of the washer plate forming a part of my invention, Fig. 5 isa detail perspective view of the nut engaging and locking member adapted. to be seated within the locked washer plates, and Fig. 6;. is aadetailed view of the Specification of Letters Patent. Patented Sept, 15 1914. Application filed December 23,1913. Serial N o. 808,45'7Q bolthaving a longitudinal V-shapedgroove formed therein. j

In the drawings I have illustrated my nut lock as employed in connection Withthfi tracks of a railway. The numeral 1 designates as an entirety the bolt forming a part of the invention and which is provided with the usual head 2 and screw threadedportion 3. This bolt is inserted through the fish plates 4 and 5 and the rail designated 6 as an entirety.

A rectangular washer plate 7 having an annular bolt receiving bore 8 formed therethrough is mounted upon the screw threaded terminal:3 of the bolt so as to interpose the nut 9 which is of the usual type and the adjacent fish plate 5. The bore 8 in the washer plate 7 is 1 adjacent one end thereof and formed within the other end of the washer plate is a dovetailed slot designated 10; This dove-tailed slotlO extends downwardly from the top of the washer plate 7 in a vertical plane and terminates approximately centrally of the upper and lower edges of theplate and is formed so that its enlarged portion is adjacent the fish plate 5 when the washer plate 7 is in position for locking operation. A nut, engaging and locking block designatedll is adapted to be fitted within the dove-tailed slot 10. This block 11 is substantially rectangular in shape and provided along one 01' its longitudinal faces with an integrally formed dovetailed portion 12 that is adapted to be fitted within the dove-tailed slot 10 so. as to provide for the outward projection of the block 11 that it may engage one of the faces of the nut 9 and serve to hold the nut against rotation and in locked position upon the bolt 1. This block 1 11 is mounted after the manner described within the, dove-tailed slot 10 of the washer plate 7. Before the washer plate is mounted upon the bolt 1 and as a means for preventing the upward movement of the block relative to the washer plate 7 there .has been provided a rib 13 that extendshorizontally with relation to the vertical axis of the block and is formed integrally with the dovetailed portion 12 upon opposite sides and adapted for engagement with a recessl l that is formed on each side of the dovetailed slot 10. It will thus be seen that the block 11 is prevented longitudinal. and lateral movement in other words removal accidentally from the washer plate 7 through 7 there has been provided a V-shaped rib 15 that is formed integrally with the inner face ofthe bore 8 and adapted to be seated within a longitudinally extending V-shaped" groove 16 that is formed in the bolt 1., a A pair of spaced curved fish plate flange engaging arms 17 is formed integral with the washer plate 7 atthe lower-longitudinal face thereof and are adapted for engagement with the lower terminal of the fish plate; These arms 17 serve to prevent rotarymovement of the washer plate 7 as they afford a greater bearing surface for the washer platein engaging the fishplate in a manner'such as described.

'The method of assembling the device may be described briefly as follows: The bolt 1 is inserted throughthe fish plates 1 and 5 and the rail 6 so that its s'crew threaded portion 8 is in 'a position adaptedto receive the washer plate 7 and nut 9. The washer plate 7 is mounted upon the screw threaded portion 3 of the bolt 1 so that the rib is seated withinthe groove-l6 in the bolt and v the arms 17 are in Y engagement with the lower portion ofthe adjacent fish plate 5 so as to prevent the turning of the I washer plate when the nut 9 is screwed gagement with'the washer plate 7 by. forcing the ribs 13 on the dovetailed-portion 12 upon the portion 3 of the bolt 1 which is the next step in the method of assembling the device. After the nut 9 is tightened to the desired degree lthei dove-tailed portion 12 of the block 11 is inserted withinthe slot 10 in the Washer plate 'The upper edges ofthe slotlO are cut away as at18 thus-when the ribs, 13 ,on the beveled'portion 12 are amovedintoengagement with the top of the Washer plate adjacent the slot 10 they are permitted further inward movement owing to the cut away portion 18 and may be driven downwardly into engagementwvith the slots 14 thus locking the block 11 in position in engagement with the' adjacent face of-th'e nut 9 and holding the nutagainst rotation. The dove-tailed portion12 is formed so as to be inserted between the lower face of the upper portion of the rail 6 and the.

upper longitudinal face of the washer plate Tafter the washer, plate and nut have been mounted in operative position uponthe bolt 1 a ,It will thus be seen that the nut engaging andlocking block 11 is locked in enin. engagement with the grooves l-iinthe dove-tailed slot 10. This action is permitted by having the upper ,edges of the groove 10 i cut away as atlS asabove'stated.

1i idapnr a: this parent may be obtained at It isapparent that the nut will beheld against-rotation by the engagement thereof wvitli tlie block 11 and*'thatthe rails of a track will be heldin the desired'engagement with each other.

In reduction to practice, 'I have found that the form of my invention, illustrated in the drawings "anclreferred to in the above description, as the preferred embodiment, is the most eificientand practical; yet'realizing thatthe conditions concurrent with the adoption of] my device will 7 nec essarilyvary, I desiretoemphasize'the fact that "various nnnor changes in detailsof construction,proportion and arrangement of parts may-be" resorted to, when required,

without sacrificing any of" the f'aclvantages of my invention, as definedfiin the appended claims. D t lVhat. is claimed isz- F 1. In a device of the character described a bolt having a longitudinal groove formed therein, a washer plate mounted upon'said bolt and havinga dove tailed e161: formed therein, a nut locking block having a dovetailed portion formed integral therewith and adapted for engagement with the clovetailed'slot in said washer plate, rib formedu'pon said washer plate and adapted for engagement with the groove in "said bolt,

in its pp Walls, said Clove-tailed portion of said locking block having rilos' formed thereon adapted for engagement with the grooves whereby the locking block' is held in locked engagement with-the washer plate and a pair of spaced-arms formedintegral with the washer plate. Y

*2. A nut lock comprising *a rectangular washer plate having? an opening there? through adjacentwo'ne endjto" receive a bolt; and a dove tailed slot formed from onelongitu'dinal edge and extending toa point approxnnately centrally thereof, a nut locking block having a clove tailedportion fornied ntegral therewith, sald doveta led slot hav-, mg grooves in ts opposed faces disposed adjacent the open endo'f said] slot, said dove tailed portion having ribs thereon arranged to fit within'said grooves, the npper ed'g'esf of said dove-tailed s'lo't being cutaway, and a pair of curved integral and spaced arms formed on the lower edge of 'said plate, f'said nut lockingblock 'ex tending' beyond the outer fac'evof'said plate and adapted to'en gage aynut. i

' In testimony whereof I niy signature" in presence of two witnesses. v I A a WILLIAM T.THURSTON :Witnesses: a h

I HERMAN LJIiEE-NE, Jenn-E. HARTNEY. f

Washington, D. 0. 1

five cents each, by addressing" the fioiiiniisloiir or lfiitiaiitsi, i 

